SM, I just want to put out there that some WAS show aspects of PDs, including BPD which may or may not be chronic.
At best, use that as a guide for yourself as to how to conduct yourself. Remaining without expectations as to how your W will behave into the future.
What ever you may or may not feel were BPD or other PD prior to the M break down, be careful not to diagnose your W with a permanent, chronic PD label. Leave that to a doctor.